noun
leading whitespace
Computing term for whitespace characters (spaces, tabs, etc.) at the beginning of a line or string.
プログラムで先頭の空白を削除する処理を書いた。
I wrote a process to remove leading whitespace in the program.
Compound of 先頭 (せんとう, 'head, beginning') + の (possessive particle) + 空白 (くうはく, 'blank, whitespace').